package Thread_.homework;

public class test9 {
    //使用两个线程来累加 count 的值
    //每个线程循环 1w 次，累加变量 count 的值，count 默认值为 0，注意线程安全问题
    private static int count;
    public static void main(String[] args) throws InterruptedException {
        Object locker = new Object();
        Thread t1=new Thread(()->{
            for(int i=1;i<=10000;i++){
                synchronized(locker){
                    count++;
                }
            }
        });
        Thread t2=new Thread(()->{
            for(int i=1;i<=10000;i++){
                synchronized(locker){
                     count++;
                }
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();//两个线程都执行结束后，打印count
        System.out.println("count: "+count);
    }
}
